List of insiders holdings for Alector, Inc.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | MCGUIRE TERRANCE Director 10% Owner | 2023-09-13 16:29:03 | 54,996 10,893,216 | 10,948,212 | Form 4 |
| 2 | Rosenthal Arnon Chief Executive Officer | 2026-10-15 16:05:10 | 5,912,047 3,930,375 | 9,842,422 | Form 4 |
| 3 | Polaris Venture Management Co. VI L.L.C. Polaris Venture Partners VI (AIV) L.P. Polaris Venture Partners Founders' Fund VI L.P. Polaris Venture Partners VI L.P. Polaris Venture Partners VI (AIV-B) L.P. 10% Owner | 2026-05-14 16:57:27 | 5,173,499 0 | 5,173,499 | Form 13G |
| 4 | ORBIMED ADVISORS LLC OrbiMed Capital GP IV LLC ORBIMED CAPITAL LLC 10% Owner | 2020-07-16 17:12:51 | 2,725,313 0 | 2,725,313 | Form 13D |
| 5 | ORBIMED ADVISORS LLC OrbiMed Capital GP IV LLC 10% Owner | 2020-07-16 17:12:51 | 2,725,313 0 | 2,725,313 | Form 13D |
| 6 | Gerngross Tillman U. Director | 2023-06-15 16:04:03 | 2,656,679 0 | 2,656,679 | Form 4 |
| 7 | SULIMAN SHEHNAAZ President and COO | 2021-12-14 20:23:09 | 787,972 0 | 787,972 | Form 4 |
| 8 | Berkley Neil Lindsay CFO & Chief Business Officer | 2026-10-15 16:05:05 | 585,216 0 | 585,216 | Form 4 |
| 9 | King Robert Chief Development Officer | 2022-10-04 20:05:59 | 565,255 0 | 565,255 | Form 4 |
| 10 | Kenkare-Mitra Sara President and Head of R&D | 2025-12-03 21:05:40 | 501,652 0 | 501,652 | Form 4 |
| 11 | Paul Robert Chief Medical Officer | 2021-08-11 18:23:30 | 431,019 0 | 431,019 | Form 4 |
| 12 | Romano Gary Chief Medical Officer | 2025-03-05 16:05:05 | 332,977 0 | 332,977 | Form 4 |
| 13 | Wong-Sarad Grace Principal Accounting Officer | 2026-10-15 16:05:07 | 332,390 0 | 332,390 | Form 4 |
| 14 | GRASSO MARC Chief Financial Officer | 2025-06-04 16:21:21 | 296,072 0 | 296,072 | Form 4 |
| 15 | Yu Calvin Vice President, Finance | 2021-07-07 19:38:23 | 220,498 0 | 220,498 | Form 4 |
| 16 | LAVIGNE LOUIS J JR Director | 2026-06-17 16:05:06 | 137,559 10,552 | 148,111 | Form 4 |
| 17 | SCHELLER RICHARD H Director | 2026-06-17 16:05:21 | 144,349 0 | 144,349 | Form 4 |
| 18 | Yaffe Kristine Director | 2026-06-17 16:05:24 | 133,559 0 | 133,559 | Form 4 |
| 19 | GAROFALO ELIZABETH A. Director | 2026-06-17 16:05:16 | 128,100 0 | 128,100 | Form 4 |
| 20 | Wehner David M. Director | 2024-06-12 16:46:05 | 115,330 0 | 115,330 | Form 4 |
| 21 | Hammond Paula Director | 2026-06-17 16:05:20 | 113,059 0 | 113,059 | Form 4 |
| 22 | Oney Sabah Chief Business Officer | 2020-10-05 16:31:00 | 109,689 0 | 109,689 | Form 4 |
| 23 | DESOUZA ERROL B Director | 2026-06-17 16:05:07 | 108,100 0 | 108,100 | Form 4 |
| 24 | Altmeyer Mark Director | 2026-06-17 16:05:09 | 108,100 0 | 108,100 | Form 4 |
| 25 | GORDON CARL L Director 10% Owner | 2019-05-14 17:45:25 | 20,000 0 | 20,000 | Form 4 |
| 26 | Rubinstein Linda M Interim Chief Financial Ofcr | 2021-09-09 16:31:18 | 0 0 | 0 | Form 3 |